六角头全螺纹螺栓是一种常见的紧固件，用于机械设备和结构的连接和固定。这种螺栓的头部呈六角形，全螺纹设计使得它能够紧密地固定在预先攻丝的孔中,分类包括外六角螺栓和内六角螺钉，它们各有特点和优势。外六角螺栓制造成本较低，适用于动力强度小、精度要求低的机械。而内六角螺钉便于紧固和拆卸，且不易滑角，常用于机械上。
| 公称直径d | 螺距p | e | k | s | 长度L | |||||||
| A级 | B级 | 公称 | A级 | B级 | max | A级 | B级 | |||||
| min | max | min | max | min | min | |||||||
| M1.6 | 0.35 | 3.41 | 3.28 | 1.1 | 1.225 | 0.975 | 1.3 | 0.9 | 3.2 | 3.02 | 2.9 | 2-16 |
| M2 | 0.4 | 4.32 | 4.18 | 1.4 | 1.525 | 1.275 | 1.6 | 1.2 | 4 | 3.82 | 3.7 | 4-20 |
| M2.5 | 0.45 | 5.45 | 5.31 | 1.7 | 1.825 | 1.575 | 1.9 | 1.5 | 5 | 4.82 | 4.7 | 5-25 |
| M3 | 0.5 | 6.01 | 5.88 | 2 | 2.125 | 1.875 | 2.2 | 1.8 | 5.5 | 5.32 | 5.2 | 6-30 |
| (M3.5) | 0.6 | 6.58 | 6.44 | 2.4 | 2.525 | 2.275 | 2.6 | 2.2 | 6 | 5.82 | 5.7 | 8-35 |
| M4 | 0.7 | 7.66 | 7.5 | 2.8 | 2.925 | 2.675 | 3 | 2.6 | 7 | 6.78 | 6.64 | 8-40 |
| M5 | 0.8 | 8.79 | 8.63 | 3.5 | 3.65 | 3.35 | 3.74 | 3.26 | 8 | 7.78 | 7.64 | 8-65 |
| M6 | 1 | 11.05 | 10.89 | 4 | 4.15 | 3.85 | 4.24 | 3.76 | 10 | 9.78 | 9.64 | 10-150 |
| M8 | 1.25 | 14.38 | 14.2 | 5.3 | 5.45 | 5.15 | 5.54 | 5.06 | 13 | 12.73 | 12.57 | 12-200 |
| M10 | 1.5 | 17.77 | 17.59 | 6.4 | 6.58 | 6.22 | 6.69 | 6.11 | 16 | 15.73 | 15.57 | 16-200 |
| M12 | 1.75 | 20.03 | 19.85 | 7.5 | 7.68 | 7.32 | 7.79 | 7.21 | 18 | 17.73 | 17.57 | 20-200 |
| (M14) | 2 | 23.36 | 22.78 | 8.8 | 8.98 | 8.62 | 9.09 | 8.51 | 21 | 20.67 | 20.16 | 30-140 |
| M16 | 2 | 26.75 | 26.17 | 10 | 10.18 | 9.82 | 10.29 | 9.71 | 24 | 23.67 | 23.16 | 25-200 |
| (M18) | 2.5 | 30.14 | 29.56 | 11.5 | 11.715 | 11.285 | 11.85 | 11.15 | 27 | 26.67 | 26.16 | 35-150 |
| M20 | 2.5 | 33.53 | 32.95 | 12.5 | 12.715 | 12.285 | 12.85 | 12.15 | 30 | 29.67 | 29.16 | 30-150 |
| (M22) | 2.5 | 37.72 | 37.29 | 14 | 14.215 | 13.785 | 14.35 | 13.65 | 34 | 33.38 | 33 | 45-150 |
| M24 | 3 | 39.98 | 39.55 | 15 | 15.215 | 14.785 | 15.35 | 14.65 | 36 | 35.38 | 35 | 50-150 |
| (M27) | 3 | / | 45.2 | 17 | / | / | 17.35 | 16.65 | 41 | / | 40 | 55-200 |
| M30 | 3.5 | / | 50.85 | 18.7 | / | / | 19.12 | 18.28 | 46 | / | 45 | 60-200 |
| (M33) | 3.5 | / | 55.37 | 21 | / | / | 21.42 | 20.58 | 50 | / | 49 | 65-200 |
| M36 | 4 | / | 60.79 | 22.5 | / | / | 22.92 | 22.08 | 55 | / | 53.8 | 70-200 |
| (M39) | 4 | / | 66.44 | 25 | / | / | 25.42 | 24.58 | 60 | / | 58.8 | 80-200 |
| M42 | 4.5 | / | 71.3 | 26 | / | / | 26.42 | 25.58 | 65 | / | 63.1 | 80-200 |
| (M45) | 4.5 | / | 76.95 | 28 | / | / | 28.42 | 27.58 | 70 | / | 68.1 | 90-200 |
| M48 | 5 | / | 82.6 | 30 | / | / | 30.42 | 29.58 | 75 | / | 73.1 | 100-200 |
| (M52) | 5 | / | 88.25 | 33 | / | / | 33.5 | 32.5 | 80 | / | 78.1 | 100-200 |
| M56 | 5.5 | / | 93.56 | 35 | / | / | 35.5 | 34.5 | 85 | / | 82.8 | 110-200 |
| (M60) | 5.5 | / | 99.21 | 38 | / | / | 38.5 | 37.5 | 90 | / | 87.8 | 120-200 |
| M64 | 6 | / | 104.86 | 40 | / | / | 40.5 | 39.5 | 95 | / | 92.8 | 120-200 |
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